THE SHADOW WALKERS is the first in Michael Walters' series of (now 3) books set in Mongolia. I read the second one The Adversary a while ago and enjoyed it very much, but as the third book is winging it's way in my direction, it's definitely time to read the first in the series - plus I'm QM'ing the discussion on 4MA early in April!
This is the second book in a police procedural series set in Mongolia, which is unusual enough to start off with.
"They are out on the steppe, miles from home. Miles from anywhere.
It is late afternoon, early spring. The immense sky is clear, just a few wisps of cloud against the rich blue. Everything - even the snow tipped mountains that surround them - is dwarfed by comparison."